Mezmerize DCB1 Building Thread - Page 58

IZHAKKATZ · 26th May 2012, 11:46 AM

Hi All,

I'm looking for a low cost vol pot for my dcb1
was thinking of one of the following:

VALAB 23 Step Attenuator:

VALAB 23 Step Attenuator Potentiometer 10K Stereo Log | eBay

or a ALPS Blue Velvet Dual 20K

Japan ALPS RK27 VOLUME potentiometer Dual 20K knurled | eBay

any recomendations as for what would be a better

Thanks
IK

ramallo · 27th May 2012, 07:30 AM

Hello,

The Valab tends to fail prematurely, I have two and both have bad contacts. IMMO best with the Alps.

IZHAKKATZ · 27th May 2012, 07:42 AM

Thanks for that Ramallo,

I just hope the ebay alps are not fake

nar · 27th May 2012, 07:52 AM

Quote:

Originally Posted by IZHAKKATZ

Thanks for that Ramallo,

I just hope the ebay alps are not fake

The "ribbed" shaft doesn't seem legit to me

Better buy one here, by Zhou Fang :

FS: ALPS RK27 series RK27112 dual 20K (for B1) and RK27114 quad 50K (for balanced)

Sure 100% genuine

Best,

nAr

IZHAKKATZ · 28th May 2012, 12:30 PM

thank you nar

nar · 28th May 2012, 12:35 PM

Quote:

Originally Posted by IZHAKKATZ

thank you nar

You're welcome

nAr

wengtech · 28th June 2012, 11:00 AM

hi,
i have 100k alps blue beauty.
can i use it for dc b1 buffer pots?
any value of parts i have to change?

thanks.

Salas · 28th June 2012, 12:48 PM

Avoid, 100K value cuts speed. Filters with the JFET input capacitance enough.

wengtech · 28th June 2012, 01:16 PM

hi salas,
thanks for the info.
btw what is the max transformer voltage can be used for dc b1 mezmerise?
i have a stock of RCore 2x18vac 0,5A is that OK ?

Salas · 28th June 2012, 01:19 PM

Its OK if you have good sinks especially for those Mosfets towards the transformer connector side. Not so much in normal mode, but if you try hot rodding the current.

27th May 2012, 07:30 AM	#572
ramallo diyAudio Member Join Date: Nov 2004 Location: Madrid	Hello, The Valab tends to fail prematurely, I have two and both have bad contacts. IMMO best with the Alps. __________________ Happiness is a warm soldering iron

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26th May 2012, 11:46 AM	#571
IZHAKKATZ diyAudio Member Join Date: Jul 2004 Location: Israel	Hi All, I'm looking for a low cost vol pot for my dcb1 was thinking of one of the following: VALAB 23 Step Attenuator: VALAB 23 Step Attenuator Potentiometer 10K Stereo Log \| eBay or a ALPS Blue Velvet Dual 20K Japan ALPS RK27 VOLUME potentiometer Dual 20K knurled \| eBay any recomendations as for what would be a better Thanks IK

27th May 2012, 07:42 AM	#573
IZHAKKATZ diyAudio Member Join Date: Jul 2004 Location: Israel	Thanks for that Ramallo, I just hope the ebay alps are not fake

28th May 2012, 12:30 PM	#575
IZHAKKATZ diyAudio Member Join Date: Jul 2004 Location: Israel	thank you nar

28th June 2012, 11:00 AM	#577
wengtech diyAudio Member Join Date: Feb 2012	hi, i have 100k alps blue beauty. can i use it for dc b1 buffer pots? any value of parts i have to change? thanks.

28th June 2012, 12:48 PM	#578
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Avoid, 100K value cuts speed. Filters with the JFET input capacitance enough.

28th June 2012, 01:16 PM	#579
wengtech diyAudio Member Join Date: Feb 2012	hi salas, thanks for the info. btw what is the max transformer voltage can be used for dc b1 mezmerise? i have a stock of RCore 2x18vac 0,5A is that OK ?

28th June 2012, 01:19 PM	#580
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Its OK if you have good sinks especially for those Mosfets towards the transformer connector side. Not so much in normal mode, but if you try hot rodding the current.